Britain’s Food Standards Agency (FSA) has confirmed that they have located horse DNA in four beef products sold by Taco Bell. This is the third series of test results regarding beef products in the country, USA Today reported.

On Friday, the agency released information regarding over 5,400 tests, which they conducted over the course of seven days; ninety-nine percent of the test scores came back negative for containing more than one percent of horsemeat DNA, according to the Huffington Post.

Some of the products that had horsemeat in them were Birds Eye’s Traditional Spaghetti Bolognese and Beef Lasagna, Brakes’ Spicy Beef Skewer and Taco Bell’s Ground Beef.

“Based on that testing we learned ingredients supplied to us from one supplier in Europe tested positive for horsemeat,” said Taco Bell’s UK spokesman Christopher Fuller. “We immediately withdrew it from sale and discontinued purchase of that meat and contacted the FSA with this information. We apologize to out customers and take this matter very seriously.”